Kask has launched the Nirvana, claiming the aero helmet offers game-changing aerodynamic performance, superior ventilation and next-level safety.Ineos Grenadiers, the Kask-sponsored WorldTour team, have been riding the Nirvana, with its distinctive ear tip covers, in public since January.As we reported at the time, the new aero helmets pattern of front vents mimic the lightweight Utopia Y, which it replaces. Meanwhile, the sides, which cover the tops of the wearers ears, and the rear bob-tail recall the Bambino.Kask pitches the Nirvana, which it claims minimises drag and optimises comfort, at road and track cyclists and triathletes seeking "maximum performance". The Kask Nirvana is available to buy now for 320 / $400 / 360 / AU$570, in medium (52-58cm) and large (59-62cm) sizes.It comes in five colours: White Matt, Black Matt, Cherry Red, Blueberry Fade and Ultra-Violet.The fastest and coolest aero helmetKask says the Nirvana achieves "aero perfection". - KaskKask claims the Nirvana is 19 per cent better ventilated and 35 per cent more aerodynamic than the best aero helmets. However, the Italian brand will not share evidence to support this claim.Relative to its own road bike helmets, Kask says the Nirvana is cooler than the Utopia Y, but not as well ventilated as the Protone Icon, Valegro and Elemento.Kask says it used computational fluid dynamics to test the aerodynamics of the Nirvana being worn by a digital model of a rider.Kask is targeting watt-obsessed roadies, track riders and triathletes with the Nirvana. - KaskAt a wind speed of 45kph, and at wind angles of 0, 10 and 20 degrees, Kask claims it found the Nirvana produces less drag than the Utopia Y.The Nirvana saves 4.4W or 72 seconds over 180km at 45kph, 6W or 7.2 seconds over 20km at 50kph and 10.4W or 1.2 seconds over 4km at 60kph, according to the brand.The Nirvana keeps your head much cooler than the best aero helmets, according to Kask. - KaskKask says the European version of the Nirvana weighs 270g, while the American and Australian model weighs 290g. The discrepancy owes to different helmet safety standards in North America and Oceania.Kask Nirvana specsThe back of the Nirvana features an eyewear port, hi-vis logos and an Octofit dial. - KaskThe Kask Nirvana features the brands Octofit+ retention system (a two-way dial at the back of the helmet). This is claimed to improve fit and comfort, while letting longer hair pass through the back of the helmet.However, Kask admits the Nirvanas ear tip covers wont suit people with large ears.The sunglasses port at the back of the helmet is optimised for cycling sunglasses from Koo, Kasks in-house brand. But Ineos Grenadiers SunGod sunglasses appear to fit fine.Multipod internal padding is said to absorb more energy if you hit your head. - KaskKask says the Nirvana meets its own WG11 safety standard. The Italian brand uses this instead of MIPS and is waiting for a rating from Virginia Tech.By absorbing 10 per cent more energy from impacts, Multipod, Kasks own 3D-printed internal padding, strengthens the helmet against linear and rotational impacts, according to the brand.Kask says Multipod is an isotropic material, meaning it reacts in the same way to force from any direction. This can minimise shear stress between the head and inside of the helmet, according to the brand.Kask acknowledges that the Nirvana's dropped sides won't fit larger ears. - KaskYou can also fit a reflective insert into the back of the helmet. Kask claims the helmets logos also improve visibility.The faux leather chin strap is washable, comfortable and shouldnt irritate skin, according to Kask.